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#engineering reference

3 articles

ReferenceREFJul 26, 20267 min read

Deep Hole Drilling Formulas Reference Sheet

Essential formulas for deep hole drilling — cutting speed, spindle speed, feed rate, material removal rate, power, torque, machining time, coolant pressure drop, and tooling cost per edge. With worked examples.

machining formulascutting speedfeed rate

ReferenceREFJul 26, 20264 min read

Hardness Conversion Table — HRC, HB, HV, HS for Deep Hole Drilling Materials

Hardness conversion reference for common deep hole drilling materials. Rockwell C, Brinell, Vickers, and Shore values per ASTM E140 with machinability guidance.

hardness conversionRockwellBrinell

ReferenceREFJul 26, 20263 min read

Material Machinability Ratings for Deep Hole Drilling — Complete Reference

Relative machinability ratings for deep hole drilling materials. Carbon steel, alloy steel, stainless, aluminum, titanium, superalloys compared with baseline AISI 1212 at 100%.

machinabilitymaterial ratingscutting data